{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3840-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3840-2","canonicalUrl":"https://aoctrl.com/siemens/5SP3840-2","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3840-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3 main miniature circuit breaker, 5SP3840-2, 3-pole, 40 A, Class E, 25 kA breaking capacity, 400 V AC, 50 Hz, busbar mount.","salesMarkdown":"## Siemens 5SP3840-2 SENTRON — 40 A Class E Main MCB for Meter Panels The Siemens 5SP3840-2 is a 3-pole main miniature circuit breaker from the SENTRON 5SP3 series, rated at 40 A with a Class E tripping characteristic and a 25 kA breaking capacity per EN 60898. It is designed for 400 V AC, 50 Hz supply systems and mounts on a 40-mm busbar system per DIN 43870 Part 2, making it the standard incoming protective device for residential and infrastructure meter panels. The Class E characteristic is a Siemens-specific curve, tuned for main distribution in meter-panel applications where coordination with downstream MCBs is required. ## Mounting and Integration — Busbar-Meter Panel Fit Mounts directly on a 40-mm busbar system in compliance with DIN 43870 Part 2, the standard for German-style meter panels. The 4.5 width units (each ~18 mm) occupy 81 mm of busbar space. Depth of 89.5 mm with a 76.3 mm enclosure depth — verify clearance to the meter-panel cover, especially if a locking slide or wire seal is fitted. Infeed is via the box terminal at the bottom of the unit; outgoing feeder uses a spring-loaded terminal. Conductors from 2.5 mm² up to 50 mm² solid or stranded are accepted, covering the full range from 6 mm² meter tails to 35 mm² main feeders. The unit is sealable via a locking slide with lock, additional wire seal, cable ties, or Antilux — meeting utility metering requirements for tamper-proofing. Protection class IP40 with connected conductors installed. Overvoltage category IV, surge voltage resistance 6 kV, insulation voltage 690 V. Shock resistance 30 g (3 impacts, 11 ms duration) and vibration resistance 2 g per IEC 60068-2-6 (20 frequency cycles, 5 to 150 Hz).","metaTitle":"Siemens 5SP3840-2 SENTRON MCB, 40 A, Class E, 25 kA","metaDescription":"Siemens 5SP3840-2 SENTRON miniature circuit breaker, 3-pole, 40 A, Class E tripping characteristic, 25 kA breaking capacity per EN 60898, 400 V AC, 50 Hz. Current lifecycle stage.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"89.5 mm","Solid":"2.5 ... 50 mm²","title":"5SP3840-2","Height":"151.3 mm","Maximum":"440 V","Minimum":"110 V","Sealable":"Yes","Stranded":"2.5 ... 50 mm²","Rated Value":"25 kA","description":"Main miniature circuit breaker (SHU), 3x 1-pole, E 40A, 230/400 V Mounting on 40 mm busbars","Mounting type":"Busbar","During Storage":"-40 ... +70 °C","Number of poles":"3","lifecycle_stage":"current","Shock resistance":"30 g, at least 3 impacts, impact duration 11 ms","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP40, with connected conductors","Overvoltage category":"IV","Design of the product":"Main miniature circuit breaker","Number of width units":"4.5","Infeed at box terminal":"Yes","Number of poles / Note":"3P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Depth / of the enclosure":"76.3 mm","circuit-breaker / Design":"5SP3","Suitability for operation":"Residential buildings/infrastructure","Design of the locking device":"Locking slide with lock, additional wire seal, cable ties and Antilux","Current / at AC / rated value":"40 A","Tripping characteristic class":"E","acc. to EN 60898 / rated value":"25 kA","Position / of power supply cord":"Stipulated by installation in the lower section of the meter panel","Insulation voltage / rated value":"690 V","Supply voltage / at AC / rated value":"400 V","Supply voltage frequency / rated value":"50 Hz","Surge voltage resistance / rated value":"6 kV","Mounting type / other installation / Note":"On 40-mm busbar system in compliance with DIN 43870 Part 2","Outgoing Feeder Via Spring-Loaded Terminal":"Yes","Vibration resistance / acc. to IEC 60068-2-6":"2 g, 20 frequency cycles 5 to 150 to 15 Hz","Display version / for switch position indicator":"OFF = green, ON = red","Mechanical service life (switching cycles) / typical":"20 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6fcd79e2bfc2f95595f26af1ef4cc486.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=414101&mlfb=5SP3840-2"},"ai":{"faq":[{"question":"What is the 5SP3840-2's depth and conductor range?","answer":"The overall depth is 89.5 mm, with an enclosure depth of 76.3 mm. It accepts solid or stranded conductors from 2.5 mm² up to 50 mm²."},{"question":"Will the 5SP3840-2 drop into a panel specified around the 5SL6563-7BB?","answer":"No — the 5SP3840-2 is a 3-pole main MCB on a 40-mm busbar mount (DIN 43870 Part 2), while the 5SL6563-7BB is a different form factor. They are not mechanically interchangeable without rewiring the panel busbar system."},{"question":"Where can I buy the 5SP3840-2 and how is it quoted?","answer":"The 5SP3840-2 is sourced to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"What compliance documentation is available for the 5SP3840-2?","answer":"The MCB is designed per EN 60898 (breaking capacity 25 kA) and carries overvoltage category IV, insulation voltage 690 V, and surge voltage resistance 6 kV. Standard manufacturer declarations for RoHS and REACH are available on request; specific UL or IEC certification documents should be confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3840-2","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SP3840-2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}